摘要
为解决五阳煤矿坚硬顶板大跨度煤巷强动压下底鼓强烈控制困难的问题,理论分析得到强动压大跨度煤层巷道底鼓特征和失稳机理,提出坚硬顶板预裂卸压、优化煤柱宽度、巷帮注浆和底板补强的协同控制技术。数值模拟和现场实测表明:坚硬顶板预裂卸压和优化煤柱宽度使得巷道处于低应力环境,巷帮注浆和底板补强能提高巷道抵抗变形能力,实现了巷道与围岩在应力环境和强度的协同,稳定后的巷道底鼓量为167 mm,顶板下沉量为116 mm,两帮移近量为141.5 mm,有效地控制了巷道底鼓。
In order to solve the difficult problem of control for strong floor heave under the influence of dynamic pressure of hard roof and large span coal roadway in Wuyang Coal Mine, the characteristics and the mechanism of the floor heave of the dynamic pressure roadway are analyzed theoretically. The cooperative control technology of hard roof pre-splitting pressure relief, optimizing coal pillar width, roadway grouting and floor reinforcement is presented. The numerical simulation and field measurement show that the hardened roof pre-cracking pressure and the optimization of the coal pillar width make the roadway in a low stress environment. The roadway grouting and the floor reinforcement can improve the resistance of the roadway, and the cooperation between stress environment and strength in roadway and surrounding rock is realized. The stability of the roadway is 167 mm, the roof sinking amount is 116 mm, the deformation of roadway two sides is 141.5 mm, and the comprehensive control technology effectively controls the roadway bottom drum.
出处
《煤矿安全》
北大核心
2017年第11期103-106,共4页
Safety in Coal Mines
关键词
坚硬顶板
大跨度煤巷
强动压影响
底鼓机理
协同控制技术
hard roof
large span coal roadway
strong dynamic pressure influence
floor heave mechanism
collaborative control technology
