急斜放顶煤开采围岩破坏规律立体模拟研究  

Solid Simulation Study of Failure Law of Surrounding Rock in Mining Steep Seams

作　　者：邵小平[1] 石平五[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054

出　　处：《采矿与安全工程学报》2006年第1期107-110,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金资助项目(50274058);高等学校博士点专项基金资助项目(20040704002)

摘　　要：通过大型组合堆体立体模拟架,对急斜煤层开采过程中围岩及上覆层变形破坏特征进行了模拟研究.研究发现急斜水平分段放顶煤开采围岩破坏主要向顶煤和顶板两个方向发展,顶煤在冒放过程中可能成拱.随着工作面的推进和顶煤的放出,破坏向上发展.煤层开采后形成的沉陷由最初在地表生成的孔洞发展为孔洞间的贯通,形成塌陷坑.随着塌陷坑周边岩体的垮落,最终形成主要沿顶板及走向发展的深槽形塌陷坑.沉陷表现为反复多次沉陷,塌陷坑内垮落体整体呈现为由底板侧朝顶板侧的台阶式下降分布.Destruction characters of surrounding rock and overlying bed were researched by means of the large solid experiment frame in mining steep seams. It was discovered that the destruction of surrounding rock develops towards roof and upper coal, which is possible to form an arch in surrounding rock in mining process. The subsidence of steep seams is different from the subsidence of gently inclined seams. The holes which appear initially will be transfixed and form a surface collapse pit in the process of mining steep seams. The collapse degree of the rocks near roof is greater than that of the rocks near bottom. The surface subsidence is characterized by repeated and collapse rock is a declined step-like distribution as mining inferior sections. Therefore, the collapse pit with deep groove will be formed at last.

关 键 词：水平分段放顶煤 离层裂隙 孔间贯通 深槽型塌陷坑 

分 类 号：TD315.3[矿业工程—矿井建设]