Study on optimum design of protective coal pillar mining under buildings in mining area
Abstract：The traditional method for reserving protective coal pillars with displacement angles increases the retention volume of protective coal pillar and causes huge waste of coal resource.In order to find the optimal size of reserved coal pillar in fully mechanized caving mining,a new idea based on the geological and mining conditions in Wangzhuang Coalmine of Lu'an mining district is put forward.According to the idea,an optimum protective coal pillar can be designed in accordance with the critical deformation value of buildings caused in mining.With the method of probability integration,a reasonable size of a reserved coal pillar is predicted when the mining faces are in different lines,and building area affected by mining,ground depression and damage to buildings caused by ground movement and deformations,such as tilt distortion and tensile deformation,are analyzed.With the 11 plans analyzed and compared,an optimal plan to reserve coal pillars under buildings is proposed in combination with economic and social effects so as to provide a scientific basis for the mining under buildings in fully mechanized caving mining.
Keywords：protective coal pillaroptimum designmovement deformationmining influence
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 507-511 )