本科论文设计-浅析深井沿空留巷支护理论与技术.docx

摘 要本设计包括三个部分：一般部分、专题部分和翻译部分。一般部分为涡北煤矿1.50 Mt/a新井设计。涡北煤矿位于安徽省亳州市境内，东有京九铁路，西有濉阜铁路，交通便利。井田走向长度约6 km，倾向长度约3.2 km，面积约19 km2。主采煤层为8号煤层，平均倾角为18°，平均厚度为9.0 m。井田工业储量为191.87 Mt，可采储量为111.03 Mt，矿井服务年限为56.9 a。矿井正常涌水量为250 m3/h，最大涌水量为280 m3/h。矿井绝对瓦斯涌出量为21.33 m3/min，属于低瓦斯矿井。根据井田地质条件，提出四个技术上可行的开拓方案。方案一：立井两水平开拓上下山开采，暗斜井延深；方案二：立井两水平开拓上下山开采，立井直接延深；方案三：立井两水平开拓上山开采，暗斜井延深；方案四：立井两水平开拓上山开采，新混合井延深。通过技术经济比较，最终确定方案三为最优方案。一水平标高-650 m，二水平标高-1000 m。设计首采区采用采区准备方式，工作面长度200 m，采用综采放顶煤采煤法，矿井年工作日为330 d，工作制度为“三八制”。大巷采用胶带输送机运煤，辅助运输采用矿车运输。矿井通风方式为中央并列式。专题部分题目：浅析深井沿空留巷支护理论与技术。深井沿空留巷是提高采出率、煤层群卸压开采，进而实施煤与瓦斯共采的关键技术。要经历两次工作面采动影响，加之深部巷道围岩变形具有高地压、大变形和长期蠕变的特点，巷道维护较浅部沿空留巷更加困难。本文以淮南顾桥煤矿深井沿空留巷为工程背景，运用FLAC3D数值模拟和现场实测相结合的手段对工程实践中经常遇到的厚直接顶、薄直接顶和无直接顶三种沿空留巷类型进行研究，提出相应的支护方案。翻译部分题目：Numerical simulation of rock burst in circular tunnels under unloading conditions。圆形隧道在卸压过程中发生岩爆的数值模拟。关键词： 立井； 暗斜井； 采区布置； 放顶煤采煤法； 中央并列式； 沿空留巷ABSTRACTThis design can be divided into three sections: general design, monographic study and translation of an academic paper.The general design is about a 1.50 Mt/a new underground mine design of Wobei coal mine.Wobei coal mine lies in Hozhou City, Anhui province.As Jingjiu railway runs in the west of the mine field and Suifu railway runs in the east of the mine field, the traffic is convenient.It’s about 6 km on the strike and 3.2 km on the dip, with the 19 km2 total horizontal area.The minable coal seam is 8 with an average thickness of 9.0 m and an average dip of 18°.The proved reserves of this coal mine are 191.87 Mt and the minable reserves are 111.03 Mt, with a mine life of 56.9 a. The normal mine inflow is 250 m3/h and the maximum mine inflow is 280 m3/h. The mine gas emission rate is 21.33 m3/min, the mine belongs to low gas mine. Based on the geological conditions of the mine, I bring forward four available projects in technology.The first is vertical shaft development with two mining levels and the first level at -650m and the second level at -850m and extension of blind inclined shaft; the seco