Taiyuan Mining Pillar

Investigation of deformation patterns by DS-InSAR in a …

The nonlinear time-series subsidence of YQ and PC Coal Mine showed in Fig. 6 may be related to the slice mining and the status of residual coal pillar in the abandoned mines. Among them, YQ Coal Mine experienced different subsidence velocities in the different phases during the monitoring period (Fig. 6 (b)). Moreover, the relief velocity of ...

Optimum position of roadway in the middle residual …

To determine the optimum position of the roadway, a method to determine the optimum position of the MRCS is proposed based on the three factors of stress, …

Frontiers | Study on stability of underlying room and pillar …

Possible issues during mining of the upper coal seam in old goaf of nearby coal seams, including step subsidence, gas overflow in goaf, and roadway around rock fragmentation. Using the Hanjiawa Coal Mine's upper coal seam mining, which takes place 28 m above the working face of the lower coal seam, as the research's focal point. The …

Instability prediction model of remaining coal pillars under …

College of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi Province, China. Correspondence Peilin Gong, College of Mining Technology, ... $ is y for the construction of the curve diagram of the remaining coal pillar mining distance and f s ${f}_{{rm{s}}}$, as shown in Figure 6. Figure 6.

Cooperative load‐bearing characteristics of a pillar …

Interval mining includes strip mining, pillar mining, and the intermittent mining, intermittent mining is unique to the ... Technology, Taiyuan, China 2State Key Laboratory of Coal Resources and ...

Experimental study on the movement law of overlying rock non-pillar

Pillarless coal mining technology is a new practical technology. Based on the compensating mechanical behavior of the Negative Poisson's Ratio (NPR) anchor cable on the roof, the roadway was successfully retained by the top cutting and pressure relief technology. This study utilizes the Digital Speckle Monitoring (DIC monitoring), stress …

Frontiers | Investigation on rational width of coal pillar and …

The methods of numerical simulation and on-site measurement is used to analysis reasonable coal pillar width (CPW) and roadway support in isolated panel of extra-thick coal seam. Numerical modeling shows that a maximum vertical stress in isolated panel is 32.9 MPa, and stress concentration factor reaches 2.99, which is more affected by the …

Double Peaked Stress–Strain Behavior and Progressive

Zhou N, Li M, Zhang JX, Gao R (2016) Roadway backfill method to prevent geohazards induced by room and pillar mining: a case study in Changxing coal mine, China. Nat Hazards Earth Syst Sci 16:2473–2484. ... Shanxi Province Research Center of Green Mining Engineering Technology, Taiyuan, 030024, Shanxi, China.

ResearchontheInfluenceofSlurryFillingontheStabilityofFloor …

Based on the mining conditions of the Yuanbaowan coal mine in Shanxi Province, this article proposes a new engi-neering technology to safely mine the upper coal seams by strengthening the bearing capacity of the floor coal pillars with the method of backfilling the room-and-pillar mining N. ic Dept Lithology Ke trata Lgend 32 31 30 29 28 27 ...

Stability of Gate Roads Next to an Irregular Yield Pillar: A …

Abstract and Figures. This paper presents results for using an irregular yield pillar for gate road stability in a split-level panel layout (SPL) at a coal mine. The mine extracts 8# and 9# coal ...

Research into stope roof control of compound roof by solid …

The corresponding ground elevation for the first mining face for solid backfilling mining at Taiyuan coal mine 1801 workface is +1244 m, while the elevation of the working seam is from +715.514 m to +872.715 m.The other parameters are as follows: the length of the workface is 150 m; the advance length is 1230 m; the dip angle of the coal seam is …

Vertical stress and stability of interburden over an abandoned pillar

Taiyuan, Shanxi 030024, P eople ... pillar mining method, high-wall pillar mining method as well as strip pillar mining method) to ensure. output and benefits, which resulted in large amounts of ...

Shanxi's remarkable 10-year transformation

Lin made the remarks during a news conference held on Aug 10 in the Shanxi provincial capital of Taiyuan, which introduced the North China province's remarkable achievements during the past 10 years since the opening of the 18th National Congress of the CPC in 2012. ... It is now upgrading 42 coal mines and 1,500 mining shafts into 5G-connected ...

Study on the Instability Mechanism and Control …

The deformation and instability of roadway surrounding rock reflect the processes of energy accumulation and release. To reveal the instability of roadway surrounding rock, based on the engineering …

Cooperative load‐bearing characteristics of a pillar …

Interval mining includes strip mining, pillar mining, and the intermittent mining, intermittent mining is unique to the is the same as that of longwall face, which mining 35‐50 m ... Technology, Taiyuan, China 2State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China

Deformation Mechanism and Control of the Surrounding Rock

According to the limit equilibrium theory of coal pillar stability, where is the width of plastic zone generated in the coal body at the goaf side after the mining of the upper working face, and its value is calculated according to the following formula: where B is the coal pillar width; is the height of roadway, 4.6 m; is the coefficient of ...

Shanxi

Shanxi University, founded in Taiyuan by an English missionary in 1902, was one of the first in China to offer Western curricula in liberal arts, law, and medicine. Since 1949 technical schools for agriculture, mining, forestry, and machine technology have been established, as have universities, colleges, senior middle schools, and primary schools.

PAPER OPEN ACCESS Study on stress distribution under …

Shanxi Tiandi Coal Mining Machinery Co., Ltd, Taiyuan, 03006, China Abstract: Room and pillar mining is a traditional mining method in the world. Carnallite/potash salt is easy to absorb water and ...

Movement and deformation characteristics of overlying …

As China's pillar of energy, coal will continue to dominate future energy consumption (Qian et al. 2018). In traditional coal mining, a working face must be reserved for a protective coal pillar. The reservation of the coal pillar wastes coal resources and easily causes disasters such as roadway deformation and gas damage.

Study on Numerical Models in Predicting Surface Deformation …

The optimal mining scheme was determined by comparing the predicted results from the analysis of theoretical calculations and numerical simulations. ... the main coal-bearing stratum in this well field is the Upper Carboniferous Taiyuan ... 12,510 working face located outside the village, partially mining the village protection coal pillar ...

International Journal of Mining Science and …

The remnant coal pillar was induced to cave in as top coal in LTCC system. Physical modelling shows that the coal pillars are the abutments of the stress arch structure …

Cooperative load‐bearing characteristics of a pillar group …

Key Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan, China. ... and interval mining. Interval mining includes strip mining, pillar mining, and the intermittent mining, intermittent mining is unique to the Yushenfu mining area, the layout of intermittent working face is the same ...

A Method for Determining Feasibility of Mining Residual …

It mainly includes the reamer-pillar coal mining, roadway pillar mining, and top-coal caving mining of the lane pillar. ... G. R. Feng, Basic Theory and Practice of Upward Mining in Coal Mine Residual Area, Taiyuan University Of Technology, Beijing, China, 2010. S. S. Peng, Longwall Mining, Springer, Berlin, Germany, 2014.

Frontiers | Research on cemented artificial pillars to replace

Replacing protective inter-block coal pillars (PICPs) with cemented artificial pillars is proposed here to address low coal recovery rates. The use of cemented artificial pillars also reduces resource waste when PICPs are used in the short-wall block mining (SBM) process. A coal mine test area in northern Shaanxi, China, was employed as the …

Occurrence and environmental impact of coal mine goaf …

Taiyuan Formation is composed of mudstone, sandstone, siltstone, limestone and 6–8 layers of coal seams, with a mean thickness of 101.5 m. ... Research on the Form Mechanism of Goaf Water and its Waterproof Coal Pillar Dimension Problem in Coal Mine. China University of Mining and Technology, Beijing (2010) Google Scholar.

Vertical stress and stability of interburden over an …

Interburden stability over an abandoned pillar working plays a significant role in guaranteeing the safety of upward mining; however, it has not yet been extensively …

Junbiao MA | Taiyuan University of Technology, Taiyuan

Junbiao MA | Cited by 240 | of Taiyuan University of Technology, Taiyuan | Read 11 publications | Contact Junbiao MA ... also termed as non-pillar mining, plays an important role in saving coal ...

Instability prediction model of remaining coal pillars …

Coal pillar stability in mining refers to stress redistribution on coal pillars after coal seam excavation. The maximum principal stress after redistribution does not …

Vertical stress and stability of interburden over an …

College of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, People's Republic of China. ... However, several small-scale coal mines adopted partial excavation methods (such as the room …

Stability of Gate Roads Next to an Irregular Yield …

Gate road pillar or chain pillar plays a significant role in safe and eficient production in longwall mining. Pillars are required to provide adequate support capacity to maintain the...

Brazil splitting characteristics of coal-backfilling …

College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention, ... Pillar-side backfilling is a method for enhancing the composite coal pillar and backfilling body, as shown in Figure 1. The overburdened strata stress can be

2 BACKGROUND OF THE VOUSSOIR BEAM STRUCTURE

1 INTRODUCTION. Thick hard main roof instability failure is one of the most hazardous and serious dynamic disasters in underground mining. 1-5 The sudden failure exhibits instantaneous, strong impact, accompanied by energy release. In addition, mining-induced fracture aperture is the main channel for aquifer water inrush and gob gas …

Vertical stress and stability of interburden over an abandoned pillar …

Affiliations 1 College of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, People's Republic of China.; 2 Research Center of Green Mining Engineering Technology in Shanxi Province, Taiyuan, Shanxi 030024, People's Republic of China.; 3 State Key Laboratory of Mining Disaster Prevention and …

Attenuation law of concentrated stress under coal …

When mining the multiple coal seams in close proximity, the coal pillar left in the goaf causes stress concentration in the floor. The layout of mining roadway in …

Xianjie DU | Taiyuan | Doctor of Engineering | Taiyuan …

Upward mining of the residual coal seam over an abandoned pillar working is one of the effective measures to alleviate the contradiction between limited resources and increased consumption.

Optimization of staggered distance of coal pillars in multiseam mining

When the staggered distance in the double-seam mining was 0 m, the coal pillar of No. 2 coal seam was located in the pressurized area formed by coal seam No. 1; additionally, there was a nearly connected principal stress influence area between the coal pillars. The coal pillar of coal seam No. 2 was seriously damaged, and roadway support …

Failure characteristics and the damage evolution of a

al. [42] monitored the impact tendency of a coal pillar failure using numerical simulation methods and verified that a back-filling body could absorb the elastic energy stored in the coal pillars. Zhang et al. [43] suggested that solid backfilling could change the stress transfer path of a coal pillar during secondary mining.

Roof Deformation Associated with Mining of Two Panels in …

Li Long 2014. Coal pillar and surrounding rock structure features in great inclined fully mechanical mining [J]. Shanxi Coal 34(04):24-26(in Chinese). Hongsheng T, Shihao T, Qingsheng B et al (2013) Instability of a coal pillar section located at a steep mining face: pillar size selection[J]. J China Univ Min Technol 42(01):6–11 (in Chinese)