Experimental Study on Coal Seam Fracturing Based on Hydrodynamic Horizontal Slitting-CO <sub><b>2</b></sub> Blasting Collaboration. [PDF]
ACS OmegaChen H +8 more
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Study on the evolution mechanism of damage to overburden fissures of repetitive mining of close coal seam groups by positive faults. [PDF]
Sci RepXu Z, Kang X, Huang D, Ren C, Cao P.
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Design and application study of the key technical parameters of dense drilling for pressure relief in coal mine roofs: a case study. [PDF]
Sci RepMa J, Wang H, Li X, Dong G, Yuan Y.
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Pressure-Relief Mining of the Working Face Under the Coal Pillar in the Close Distance Coal Seams
Geotechnical and Geological Engineering, 2016Intensive 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 ...
Guangbo Li
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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.
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Analysis of Close Distance Coal Seam’s Mining Rational Staggered Distance
Advanced Materials Research, 2015As 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 ...
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Analysis on the floor stress distribution and roadway position in the close distance coal seams
Arabian Journal of Geosciences, 2016According 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
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Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway
Advanced Materials Research, 2012The 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
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