涡北煤矿1.8Mta新井设计.docx

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。一般部分为涡北煤矿1.8Mt/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5.567.06km，倾向长1.643.27km，水平面积约为15.12km2。主采煤层为8号煤组，平均倾角为21，81煤、82煤平均厚度均为5.5m，间距10.5719.77m，平均15m。井田工业储量为213.7234Mt，可采储量为125.7174Mt，矿井服务年限为53.73a。矿井正常涌水量为420m3/h，最大涌水量为860m3/h。矿井相对瓦斯涌出量为15.98m3/t，属于高瓦斯矿井。根据井田地质条件，提

2、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混合开采，暗斜井延深；方案二：立井两水平开拓上下山混合开采，立井直接延深；方案三：立井两水平开拓上下山混合开采，暗斜井延深；方案四：立井两水平开拓上下山混合开采，立井直接延深。通过技术经济比较，最终确定方案一为最优方案。一水平标高650m，二水平标高1000m。设计首采区采用采区准备方式，工作面长度180m，采用大采高一次采全厚采煤法，矿井年工作日为330d，工作制度为“四六制”。大巷采用胶带输送机运煤，辅助运输采用矿车运输。矿井通风方式为前期中央并列式，后期中央并列式与两翼对角式混合通风。专题部分题目：跨采大巷的矿压显现规律及其支护技术

3、。跨煤层底板大巷回采不仅是回收资源的一种有效途径，更能使被跨采巷道长期处于开采形成的底版低应力区内，显著减小巷道围岩变形，有利于改善巷道维护状态，使巷道保持长期稳定。但被跨采巷道要依次经历跨采所引起的前支承压力影响区、前支承压力显现区、卸压区、后支撑压力区和压力重新稳定区，其对巷道的围岩整体性具有严重的破坏作用，对跨采期间巷道的支护提出新的更高要求。本文总结了前人对跨采巷道矿压显现规律、跨采巷道围岩变形预测、跨采巷道围岩稳定性分析及锚注支护在跨采巷道维护中的应用等问题所做的研究工作，对跨采大巷矿压显现规律及其支护技术形成了系统的认识。翻译部分题目：A plasticity model for

4、the behaviour of footings on sand under combined loading。复合载荷下沙层地基运转塑性模型。关键词：立井；暗斜井；采区布置；大采高一次采全厚采煤法；中央并列式；两翼对角式；跨采大巷ABSTRACTThis design can be divided into three sections: general design, monographic study and translation of an academic paper.The general design is about a 1.8 Mt/a new underground m

5、ine design of Guobei coal mine. Guobei coal mine lies in Bozhou 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 is 5.567.06km on the strike and1.643.27km on the dip, with the15.12km2 total

6、 horizontal area. The minable coal seams are 81 and 82, both with an average thickness of 5.5m and an average dip of 21. The distance between 81 and 82 is about 10.5719.77m, with an average of 15m. The proved reserves of this coal mine are 213.7234Mt and the minable reserves are 125.7174Mt, with a m

7、ine life of 53.73a. The normal mine inflow is 420m3/h and the maximum mine inflow is 860m3/h. The mines relative gas emission rate is15.98 m3/t, so the mine belongs to high gas mine.Based on the geological conditions of the mine, I bring forward four available projects in technology. The first is ve

8、rtical shaft development with two mining levels and the first level is at 650m, the second level is at 1000m with extension of blind inclined shaft; the second is vertical shaft development with two mining levels and the first level is at 650m, the second level is at 1000m with extension of vertical

9、 shaft; the third is vertical shaft development with two mining levels and the first level is at 600m and the second level is at 850m with extension of blind inclined shaft; the last is vertical shaft development with two mining levels and the first level is at 600m and the second level is at 850m w

10、ith extension of vertical shaft. The first project is the best one, comparing with other three projects in technology and economy. The first level is at 650m, the second level is at 1000m.Designed first mining district makes use of the method of the mining district preparation. The length of working

11、 face is 180 m, which uses high cutting coal mining method. The working system is “four-six” which produces 330 d/a.Main roadway makes use of belt conveyor to transport coal resource, and mine car to be assistant transport. The type of mine ventilation system is center ventilation during early days,

12、 and the combination of center ventilation and two wings ventilation during later period.The monographic study is the law of the dynamic strata behavior of the main roadway influenced by overhead mining and its supporting technique. Mining cross over gateway is not only a effective way to mine the c

13、oal resource, but also can make the main roadway influenced by overhead mining in the low stress district, and decrease the transmutation of the rock around the roadway, as a result it benefit the maintenance of the roadway, make sure its stabilization for a long time. However, the main roadway infl

14、uenced by overhead mining must go though the leading abutment pressure influencing district, the leading abutment pressure obvious district, the low abutment pressure district, the behind abutment pressure district and the pressure second stable district, which aroused by the caving over the roadway

15、. It damages the surrounding rock seriously and request higher level of supporting. In this paper, the law of the dynamic strata behavior of this roadway, the forecasting for the transmutation of the surrounding rock, the analysis of the stability of the surrounding rock and the use of bolt-grouting

16、 support in the maintenance of the influenced roadway, made by the earlier academicians, is summarized, and have a systemic understanding to the law of the dynamic strata behavior of the influenced roadway and its supporting technique.The translated academic paper is “A plasticity model for the behaviour of footings on sand under combined loading”.Keywords: Vertical shaft; Blind inclined shaft; Mining district preparation; High cutt