Results 151 to 160 of about 1,100 (178)

Design and application study of the key technical parameters of dense drilling for pressure relief in coal mine roofs: a case study. [PDF]

Sci Rep
Ma J, Wang H, Li X, Dong G, Yuan Y.
europepmc   +1 more source

Mechanism and prevention of bed separation water hazards in karst coal mining areas of Northern Guizhou Province, China. [PDF]

Sci Rep
Gao Z, Cheng J, Li Y, Yao H, Xu G, Liu Y.   +5 more
europepmc   +1 more source

Study on the evolution and transport pattern of overburden fracture induced by mining in cave mines. [PDF]

Sci Rep
Zhang Y, Xu M, Kong D, Zuo Y, Wu G, Chen F, Zhou Y.   +6 more
europepmc   +1 more source

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Research on long-term migration behaviors of heavy metals after close-distance coal seam backfill mining

Journal of Hazardous Materials
The backfill mining of coal-based solid waste in goaf poses a potential risk of heavy metal pollution to the groundwater environment, and the migration behavior of heavy metals differs significantly under the disturbance of backfill mining in close-distance multi-layer coal seams and single-layer coal seams.
Junmeng Li, Yingshun Li
exaly   +3 more sources

Gas Migration Law and Precision Extraction in Close Distance Coal Seam Goaf: A Case Study

Geotechnical and Geological Engineering, 2023
Dezhong Kong, Kong Dezhong, Shang Yuqi   +2 more
exaly   +2 more sources

Analysis of Close Distance Coal Seam’s Mining Rational Staggered Distance

Advanced Materials Research, 2015
As 2# and 3# coal in Baoxin coal mine are close distance coal seams, combined mining is adopted to ensure the production, and reasonable staggered distance needs to be determined between the upper and lower adjacent workfaces. Calculated on the influence of strata movement, there is a empirical formula for the coal’s alternate distance.It is necessary ...
Bao Sheng Song, Dan Yang Jing, Yu Zhou, Dian Qi Zhou   +3 more
openaire   +1 more source

Pressure-Relief Mining of the Working Face Under the Coal Pillar in the Close Distance Coal Seams

Geotechnical and Geological Engineering, 2016
Intensive strata behaviors are generated when the No. 8707 working face of the 8# coal seam in a coal mine is advanced by way of the pillars left over of the upper part of 7# close distance coal seam. The theoretical analysis, numerical simulation and filed measurement were utilized to obtain the rule of the stress change when the 8707 working face of ...
Jun Zhao, Guangbo Li
openaire   +1 more source

Analysis on the floor stress distribution and roadway position in the close distance coal seams

Arabian Journal of Geosciences, 2016
According to the mine ground pressure and soil mechanics, the stress under a pillar is proportional to the coal pillar pressure and is in inverse proportion to the vertical depth and the pressure diffusion angle and is spreading along the gravity direction elliptically.
Liu Xinjie, Li Xiaomeng, Pan Weidong
openaire   +1 more source

Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway

Advanced Materials Research, 2012
The support effectiveness of mining gateway at closed-distance seam is determined by the layout of mining gateway and the stress effect of the upper coal pillar load on the bottom seam. The stress effect is affected by the coal pillar size and the properties of the coal pillar and surrounding rocks.
Chun Lei Ju, Guo Dong Zhao, Feng Gao
openaire   +1 more source