浅埋薄基岩含水层下巷柱式放顶煤充填开采技术

为了提高煤炭资源采出率且实现对地表含水层的保护,针对榆林市榆阳区煤层普遍埋藏浅、基岩薄、地表及基岩有含水层的特点,分析了房柱式、刀柱式采煤法的煤柱稳定系数小于1,煤柱失稳最终破坏地表上覆含水层.因此,提出了一种高采出率、保水的巷柱式放顶煤充填开采新方法,通过对巷柱式放顶煤巷道布置、回采工艺以及充填工艺的介绍,以期推动类似条件矿区采煤方法的改革,实现资源与环境的协调开采.

Backfill mining technology for gateway and pillar top coal caving mining under aquifer of shallow thin bedrock

In order to improve the coal recovery rate and to protect the surface aquifer, according to the characteristics of low depth, thin bedrock and aquifer in the ground and bedrock for the coal seams in Yuyang Area of Yulin City, the paper analyzed the coal pillar with the stability coefficient less than 1 and the coal pillar lost stability finally to destroy the surface for the coal pillar of room - pillar mining and knife pillar mining. Therefore the paper provided a new gateway and pillar top coal caving mining method with high coal recovery rate and water protection. The paper introduced the gateway layout of the gateway and pillar top coal caving mining face, the mining technique and the backfill technique to push the reform of the mining method in coal mines with similar conditions and to have a coordinate mining between the resources and environment.