余吾煤业7602工作面“三带”发育规律相似材料模拟试验研究

Simulation Study on Similar Material for Development of Three Zones on 7602 Working Face in Yuwu Coal Industry

为了研究采动条件下瓦斯运移与裂隙分布的动态关系,同时为治理采空区瓦斯提供指导,利用相似模拟试验研究了7602工作面采动覆岩裂隙发育规律。研究结果显示:7602工作面的初次来压步距大约有30 m,周期来压大约在16 m;"两带"发育高度约为90 m,其中冒落带高度为22 m,裂隙带高度为68 m。裂隙发育位置的确定,可以为高位钻孔和高抽巷终孔位置的确定提供依据,并且为矿井瓦斯抽采及瓦斯灾害、顶板冒落事故及透水事故防治等提供技术支持。

In order to study the dynamic relationship between gas migration and fissure distribution under mining conditions and to provide guidance for gas control in goaf, the development degree of crack in mining overburden of 7602 working face was studied experimentally by using physical similarity simulation. The results showed that the first step distance of 7602 working face is about 30 m, the periodic pressure is 16 m, the height of "Two Zones" is about 90 m, the height of falling zone is 22 m, the height of fracture zone is 68 m. This provides accurate parameter index for the location of high drainage roadway and high hole end hole, and provides technical support for gas drainage and gas disaster, roof caving accident and water permeation accident prevention and treatment in coal mine.