本文選題：上行開采 + 采動影響系數(shù)　； 參考：《煤炭學(xué)報》2017年04期

【摘要】：以龜茲礦業(yè)西井A6-103上行工作面具有的特殊采掘地質(zhì)條件(即采動影響系數(shù)小和層間巖層堅硬)為工程背景,通過理論分析與數(shù)值模擬相結(jié)合的方法,建立了下部采空區(qū)邊界處"懸空結(jié)構(gòu)"的力學(xué)模型,并推導(dǎo)出該結(jié)構(gòu)二次失穩(wěn)的形式及其判據(jù),認(rèn)為"懸空結(jié)構(gòu)"保證了上部煤層的連續(xù)性,在一定程度上有利于上行工作面的回采,但是該結(jié)構(gòu)在上行工作面超前支承壓力影響下的二次失穩(wěn)將會給上行工作面的安全回采帶來較大的安全隱患。此外,通過相似模擬的方法,分析研究了上行開采過程中采場圍巖的破斷形態(tài),驗證了下部采空區(qū)邊界"懸空結(jié)構(gòu)"的存在及其對上行工作面回采過程的利弊影響。
[Abstract]:Based on the special mining geological conditions (that is, small mining influence coefficient and hard interlayer rock formation) in A6-103 upward working face of west well of Qiuzi mining industry, the method of combining theoretical analysis with numerical simulation is adopted. The mechanical model of the "suspended structure" at the boundary of the lower goaf is established, and the form of the secondary instability of the structure and its criterion are deduced. It is considered that the "suspended structure" ensures the continuity of the upper coal seam. To a certain extent, it is beneficial to the mining of the uplink face, but the secondary instability of the structure under the influence of the advance supporting pressure of the uplink face will bring the safety hidden danger to the safety mining of the uplink face. In addition, through the method of similar simulation, the breakage form of surrounding rock in the upward mining process is analyzed and studied, and the existence of the "suspended structure" at the boundary of the lower goaf and its advantages and disadvantages on the mining process of the upward face are verified.
【作者單位】： 煤炭科學(xué)技術(shù)研究院有限公司安全分院;煤炭科學(xué)研究總院煤炭資源高效開采與潔凈利用國家重點實驗室;河南能源化工集團(tuán)新疆投資控股有限公司;新疆龜茲礦業(yè)有限公司;
【基金】：國家自然科學(xué)基金資助項目(51404140,51304117)
【分類號】：TD823
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本文編號：2041857