急斜煤层防水煤岩柱的失稳及留设  

Instability Characteristic and Reasonable Design of Water-Preventive Coal-Rock Pillars in Mining Steep Coal Seams

作　　者：刘长友[1] 刘跃俊[1] 黄炳香[1] 李永明[1] 李西蒙[1] 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2010年第3期330-334,共5页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2007CB209400);国家自然科学基金项目(50774079)

摘　　要：基于龙湖煤矿的水文地质条件,采用数值计算和相似模拟相结合的方法,研究了在不同煤厚和煤柱宽度时,防水煤岩柱的稳定性和失效形式,结果表明:采厚增加,导水裂隙的发育高度显著增大,裂采比增大;大煤柱不能明显降低导水裂隙的发育高度和煤柱塑性破坏宽度;防水失效主要有煤柱的塑性破坏和导水裂隙导通上部含水层两种形式;薄煤层防水煤岩柱留设应重点防止煤柱的塑性破坏,而厚煤层则应考虑导水裂隙的贯通情况.Based on the geohydrologic conditions of Longhu mine, we used numerical calculation and analog simulation to study the stability and failure form of coal-rock pillar when coal seam thickness and coal pillar width vary. The results show that, with the increase of mining thickness, the height of water flowing fractured zone increase significantly, the fractured height to mining thickness ratio increases, and the big coal pillar cannot obviously reduce the height of water flowing fractured zone. In addition, the water-preventive has two forms of failure： one is the plastic failure, and the other is water flowing fracture becomes connected with the aquifer. For thin coal seams, the reasonable pillar remaining should take the plastic failure into consideration; while for thick seam, the pillar remaining should take the connection of conductive fractures into consideration.

关 键 词：水体下开采 急斜煤层 防水煤岩柱 

分 类 号：TD325[矿业工程—矿井建设]