發(fā)布時間：2018-06-17 21:44

  本文選題：沿空留巷 + 切頂卸壓�。� 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：由于河南焦作煤業(yè)集團(tuán)各礦區(qū)每年留設(shè)煤柱,大量浪費(fèi)煤炭資源,由此進(jìn)行沿空留巷工程可以減少甚至避免煤炭資源浪費(fèi)現(xiàn)象的發(fā)生。本文主要以河南焦作煤業(yè)集團(tuán)趙固一礦16011工作面為工程背景,針對該工作面下順槽開展的切頂卸壓沿空留巷項(xiàng)目,著重分析留巷過程中預(yù)裂切縫的設(shè)計(jì),并針對已設(shè)計(jì)出的各預(yù)裂切縫進(jìn)行數(shù)值模擬驗(yàn)證。結(jié)合PU監(jiān)測系統(tǒng)反饋數(shù)據(jù),分析設(shè)計(jì)方案的實(shí)際工程效果。本文采用理論分析、數(shù)值模擬、工程實(shí)踐等技術(shù)手段對上述問題進(jìn)行分析探討,現(xiàn)得出以下主要結(jié)論:(1)傳統(tǒng)的沿空留巷主要是通過在采空區(qū)側(cè)采用木垛、巷道密集支護(hù)或是矸石充填以及混凝土充填來實(shí)現(xiàn)的。這些方式不到費(fèi)事費(fèi)力,成本高昂,而且護(hù)巷效果不甚理想,采用切頂卸壓沿空留巷可以避免上述不足之處;(2)構(gòu)建了傳統(tǒng)長壁開采模式下沿空留巷及切頂卸壓沿空留巷的力學(xué)模型,經(jīng)過理論計(jì)算,得出切頂卸壓沿空留巷在趙固一礦16011工作面理論上可行,并對比得出切頂卸壓沿空留巷支承壓力小于傳統(tǒng)長壁開采模式下的沿空留巷的支承壓力,支護(hù)成本小,安全可靠性高。(3)以實(shí)用礦山壓力為依托,通過力學(xué)分析及數(shù)值模擬,確定頂板預(yù)裂切縫合理高度為9m,合理角度為15°,合理間距為600mm。采用此種設(shè)計(jì)可以使16011工作面采空區(qū)上覆巖層完全垮落,但是不影響沿空順槽的圍巖穩(wěn)定性;(4)針對趙固一礦16011工作地質(zhì)條件,對其留巷段在原有巷道支護(hù)形式的基礎(chǔ)上進(jìn)行了危險(xiǎn)性分區(qū),并對其進(jìn)行了補(bǔ)強(qiáng)支護(hù)設(shè)計(jì),結(jié)合切頂卸壓技術(shù)手段達(dá)到留巷目的。(5)通過PU監(jiān)測系統(tǒng)數(shù)據(jù)反饋分析可知:切縫順槽側(cè)工作面壓力較小,工作面周期來壓步距較大;原有巷道上方的應(yīng)力逐漸向相鄰工作面轉(zhuǎn)移,使得留巷段巷道處于抵應(yīng)力區(qū),保證了所留巷道的圍巖穩(wěn)定性,此時巷道變形主要表現(xiàn)為頂板下沉,最大下沉量出現(xiàn)在切眼口處,需在此處進(jìn)行補(bǔ)強(qiáng)支護(hù)。
[Abstract]:Because every mining area of Henan Jiaozuo Coal Industry Group keeps coal pillars every year, a large amount of coal resources are wasted, so the coal resource waste can be reduced or even avoided by the roadway retaining engineering along the goaf. Taking the 16011 face of Zhaogu No. 1 Coal Mine of Henan Jiaozuo Coal Industry Group as the engineering background, this paper focuses on the design of pre-split cutting joint in the course of retaining roadway. Numerical simulation is carried out to verify the designed pre-crack cutting joints. Based on the feedback data of pu monitoring system, the practical engineering effect of the design scheme is analyzed. In this paper, theoretical analysis, numerical simulation and engineering practice are used to analyze and discuss the above problems. The main conclusions are as follows: 1) the traditional roadway along the goaf is mainly through the use of wood stacking on the side of the goaf. Roadway dense support or gangue filling and concrete filling to achieve. These are less laborious, costly, and less effective in protecting alleys. The mechanical model of the traditional long wall mining model of the gob side and the cut top pressure release along the gob retaining roadway can be avoided by using the cutting top pressure relief roadway along the gob side, and the mechanical model of the traditional long wall mining mode is constructed, and the theoretical calculation is carried out. It is concluded that it is theoretically feasible to cut the top and release the roadway along the goaf and leave the roadway along the gob in Zhaogu No. 1 Coal Mine, and it is concluded that the supporting pressure of the cutting top relief along the gob retaining roadway is less than that of the traditional longwall mining mode, and the supporting cost is small. Based on practical mine pressure and mechanical analysis and numerical simulation, it is determined that the reasonable height, reasonable angle and reasonable spacing of roof pre-splitting joint are 9m, 15 擄and 600mm. By adopting this design, the overlying strata in goaf of No. 16011 face can collapse completely, but the stability of surrounding rock along the goaf can not be affected.) according to the working geological conditions of No. 16011 Zhaogu No. 1 Mine, On the basis of the original roadway support form, the dangerous zoning is carried out for the roadway retaining section, and the reinforcement support design is carried out. According to the data feedback analysis of pu monitoring system, it can be concluded that the pressure of the side face along the cutting joint is small, the pressure of the working face is larger; The stress above the original roadway is gradually transferred to the adjacent working face, which makes the roadway in the residual roadway in the stress zone, which ensures the stability of the surrounding rock of the remaining roadway. At this time, the roadway deformation is mainly shown as roof subsidence, and the maximum amount of subsidence occurs at the cut hole. Reinforcement support is needed here.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊衡;;走向長壁采煤法采煤系統(tǒng)簡析[J];內(nèi)蒙古煤炭經(jīng)濟(jì);2016年11期

2 王淑軍;;窄煤柱護(hù)巷技術(shù)研究[J];山西煤炭管理干部學(xué)院學(xué)報(bào);2015年02期

3 張斌;王存文;譚洪山;史先鋒;成功;;淺埋深煤層長壁式復(fù)采區(qū)段煤柱穩(wěn)定性研究[J];煤炭科學(xué)技術(shù);2015年01期

4 邢紀(jì)偉;馮酉森;鄔劍明;王俊峰;吳煥凱;;無煤柱沿空留巷支護(hù)技術(shù)[J];煤炭技術(shù);2014年10期

5 張農(nóng);韓昌良;闞甲廣;鄭西貴;;沿空留巷圍巖控制理論與實(shí)踐[J];煤炭學(xué)報(bào);2014年08期

6 何滿潮;劉冬橋;宮偉力;汪承超;孔杰;杜帥;張s，

本文編號：2032560