1、摘 要本设计包括三个部分：一般部分、专题部分和翻译部分。一般部分为许疃煤矿1.2Mt/a新井设计。许疃煤矿位于安徽省宿州市，地处平原，土地肥沃，农作物生长良好。井田南北走向长6.276.47km，东西倾向宽3.113.73km，井田面积约19.94km2。井田内主要可采煤层72煤层，倾角6.615.5，平均厚度3m。矿井工业储量为123.56Mt，可采储量为85.74Mt Mt，设计服务年限54.9a。矿井正常涌水量为1050m3/h，最大涌水量为1660m3/h。矿井相对瓦斯涌出量为22m3/t，最大绝对瓦斯涌出量为64.83m3/min，属高瓦斯矿井。煤层属可能自然发火煤层，煤尘有爆炸危险
2、性。根据矿区及井田地质条件，设计采用立井单水平开拓方式。上山布置带区，断层上盘布置采区，全井田共划分为四个带区，一个两翼采区，一个单翼采区。轨道大巷、胶带机大巷和回风大巷根据服务年限布置在煤层或岩层。本矿井为高瓦斯矿井，设置专用回风井巷，并预掘底板瓦斯抽排巷进行瓦斯卸压抽放，矿井通风方式采用中央并列式。针对涌水量大，大巷均向井底车场微斜自然排水，下山上行开采，后期向采空区排水。首采区带区式准备，工作面设计长度220m，采用综合机械化采煤工艺。矿井年工作日为330d，昼夜净提升时间为18h。矿井采用“四六”制工作制度，三班生产，一班检修。生产班每班完成2个采煤循环。循环进尺为0.8m，日产量为4
3、243.54t。矿井煤炭采用胶带输送机运输，辅助运输采用DLZ110F柴油机单轨吊。主井采用一对12t底卸式箕斗提煤，副井采用多绳摩擦式提升机提升一窄（1.02）一宽（1.67）罐笼。专题部分题目为：离层分区注浆减沉技术在许疃煤矿应用探讨。在绿色开采及科学采矿理念的指导下，结合许疃煤矿覆岩特征及“三下”压煤状况，提出对高采出率下减缓地表下沉技术的探索。运用数值模拟方法对离层区注浆减沉技术在许疃煤矿的使用进行了分析探讨。设计工作面长160m，关键层下岩层可达超充分采动状态；离层区充填体分担了部分覆岩载荷，分区煤柱应力集中明显减小；分区间跳采，因跳采出现的孤岛工作面待两侧离层区充填稳定后仍用离层区
4、充填方法开采，数值模拟结果表明此方法可以有效减缓地表沉陷、提高资源开采率。翻译部分主要讲述了爆破卸压的应用现状，包括地质、岩石性质、开采条件和爆破参数（炮孔布置、孔深、爆破载荷等），讨论了爆破卸压的优势并对其作为解决高采动应力引起冲击矿压的效果进行了评价，英文题目为：Destress Blasting in Coal Mining State-of-the-Art Review。关键词：许疃煤矿；立井单水平；瓦斯卸压抽放；下山上行开采；单轨吊；F5逆断层；变频对旋式通风机；离层区；数值模拟；爆破卸压1ABSTRACTThis design includes three parts: the g
5、eneral design, the monographic study and the translation.The general design is about a 1.2Mt/a new underground mine design of Xutuan Coal Mine. Xutuan Coal Mine lies in Suzhou City, Anhui province，where soil is flat and fertile. Its about 6.276.47km on the strike and 3.113.73km on the dip, with the
6、19.94km2 total area. The main aquifer coal seam is 72 coal seam with an average thickness of 3 m, and the dip is 6.615.5. The proved reserves of this coal mine are 123.56Mt and the minable reserves are 85.74Mt, with a mine life of 54.9 years. The normal mine inflow is 1050m3/h and the maximum mine i
7、nflow is 1660m3/h. The mine relative gas emission quantity is 22m3/t, and the absolute gas emission quantity is 64.83m3/min. The coal seam is feasible spontaneous combustion coal seam and the coal dust has explosion hazard.Based on the geological condition of the mine, this design uses a vertical sh
8、aft single-level development method,which divided into four bands and two districts, and track roadway, belt conveyor roadway and return airway are different on different lifetime, arranged in the floor rock or coal seam. Taking into account of the high gas emission, set up dedicated roadway for ven
9、tilation, and excaves bottom gas drainage roadway to relief gas pressure, mine ventilation method use Central abreast ventilation.in connection of big water inflow ,roadway tilts to the shaft bottom to facilitate drainage , ascending mining is adopted in the district dip,take advantage of goaf for d
10、rainage.Designed first mining district makes use of the method of the strip district preparation. The design length of working face is 220m, which uses fully mechanized mining technology. The working days in one year are 330. Everyday it takes 18 hours in lifting the coal. The operation mode in the
11、mine is “four-six” with three teams mining and the other overhauling. Every mining team makes two working cycle. So everyday there are 6 working cycles. The advance of a working cycle is 0.8m, and the quantity of 4243.54 ton coal is maked everyday.Main roadway makes use of belt conveyor to transport
12、 coal resource, and overhead monorail to be assistant transport. The main shaft uses a double 12t skips to lift coal and the auxiliary shaft uses two cage，one is 1.02m and the other is 1.67m.The monographic study entitled “Application of isolated section grouting technology for overburden bed separa
13、tion space in Xutuan coal mine”. Under the guidance of concept of green mining and scientific mining,in connction of characteristic of Xutuan, exploring a way to reduce subsidence with a high recovery.Studid by numerical simulation.The length of woking face is 160m,rock statum under the key statum c
14、an be full mining;in terms of backfill shares some stress, coal pillar stress was significantly reduced.skip-mining amone isolated section,island mining face was mined after stability of both sides of gob. The numerical results show that this method can effectively reduce mining subsidence , increas
15、e the coal recovery.The translated academic paper presentsa state-of-the-art review of destress blasting in coal mining. Information such as geology, rock properties, miningconditions as well as blasting parameters such as blasthole layout, hole length, explosive loading etc. are presented.The paper
16、 discusses the main benefits of destress blasting and the evaluation of its effectiveness as a measure toovercome the challenges of high mining-induced stresses causing coal bumps and rockbursts.The title is “Destress Blasting in Coal Mining State-of-the-Art Review”.Keywords: Xutuan coal mine; shaft single-level development; gas drainage and relief gas pressure ; ascending mining in the district dip ; overhead monorail ;F5 reverse fault;ro
