【摘要】：為確定掘進(jìn)巷道過殘采區(qū)域時(shí)煤柱的合理寬度,采用理論計(jì)算及數(shù)值模擬,對(duì)不同寬度殘采煤柱穩(wěn)定性、應(yīng)力分布及其內(nèi)部巷道受蠕變影響后的變形破壞特征進(jìn)行了分析,研究表明:當(dāng)煤柱寬度為15 m時(shí),微破裂隙貫通煤柱,確定煤柱臨界尺寸為15m;殘采煤柱經(jīng)過二次蠕變破壞,巷道位移曲線可分為Ⅰ蠕變遞增區(qū)、Ⅱ蠕變衰減區(qū)、Ⅲ穩(wěn)定蠕變區(qū)共三個(gè)階段,相應(yīng)的巷幫應(yīng)力曲線類型可分為馬鞍型、幾字型和孤峰型。
[Abstract]:In order to determine the reasonable width of coal pillar in the over-residual mining area of tunneling roadway, the stability, stress distribution and deformation and failure characteristics of inner roadway affected by creep are analyzed by theoretical calculation and numerical simulation, and the stability and stress distribution of residual coal pillar with different width are analyzed by means of theoretical calculation and numerical simulation. The results show that when the width of the pillar is 15m, the critical size of the pillar is 15m. After secondary creep failure, the displacement curve of the roadway can be divided into three stages, I creep increasing zone, 鈪，

本文編號(hào)：2436155