اتصل

هاتف

+0086-371-86162511

عنوان

تشنغتشو ، الصين

البريد الإلكتروني

[email protected]

coal mining sequence

On strata damage and stress disturbance induced by coal mining

Following the actual coal mining sequence in Buertai coal mine, the experiment adopted the downward mining method, namely No. 22 coal seam (19.3 mm Results from this study reveal the characteristics of sedimentary environment and sequence stratigraphic, coal accumulation Sequence stratigraphy and coal accumulation

احصل على السعر

Sequence optimization in longwall coal mining SpringerLink

IC has applied a proprietary mixed integer linear programming open pit strategic mine planning tool called Blasor to rapidly evaluate, for a number of longwall Based on a highwall mining project in Australia, this study adopted the FLAC 3D numerical simulation method to investigate the stability of coal pillars with Simulation Research for the Influence of Mining Sequence on Coal

احصل على السعر

补连塔煤矿中生界高分辨率层序地层与沉积环境演化

High-resolution sequence stratigraphy and sedimentary environment evolution of Mesozoic in Bulianta coal mine. Chinese Journal of Geology, 57 (4): 1262 Songhao Shi. Multi-coal-seam mining creates surrounding rock control difficulties, because the mining of a coal face in one seam can affect coal faces in another. We examine the effects of multiLithology of the coal seam and mining sequence

احصل على السعر

Study on the Optimization of the Sequence of

Continuous mining and charging, recovery sequence optimization, numerical simulation, progressive bearing characteristics . Abstract: In the process of For the characteristics of overburden deformation and energy release under different mining sequences of close-distance coal seam groups, physical material similar simulation experiments were Energies Free Full-Text Study on Deformation

احصل على السعر

The optimal framework and model to balance underground coal mining

Coal and cropland respectively play a role in ensuring national energy security and food security. However, coal mining has caused large areas of arable land A dynamic optimization method was created to address the production schedule issue in an open-pit coal mine while taking into account the characteristics of the fuzzy structured element. The fuzzy Frontiers Dynamic optimization of open-pit coal

احصل على السعر

Price Estimation of Coal Seam and Its Application in the

The NPV of the sale amount is increased by 1.53%, equivalent to 225.17 million Chinese Yuan, after the optimization of mining sequence in the undisclosed coal mine. The case study indicated that the optimization of mining sequence considering the heterogeneous coal price can increase the economic benefit while mining the same coal Here's a step-by-step guide to how a room and pillar mine is developed. 1. Exploration. First, a deposit must be identified and determined as suitable for this technique. Coal, iron, and uranium are Beginners Guide to Room and Pillar Mining An

احصل على السعر

Research on InSAR Monitoring Precision Analysis of Coal

*Corresponding author: jc_yan@163 Research on InSAR Monitoring Precision Analysis of Coal Mining Influence Based on Long Time Sequence Junhai Gao1,2, Rongjiu Gao2, Lisheng Chen2, Yongbin Han 2, Jiancheng Yan 1,2,* and Xingli Li2 1Tangshan Branch, China Coal Science and Technology Ecological Environment Technology Co, Ltd, In the green backfilling mining of underground coal mines, gangue in a coal seam is used to replace and fill goafs. However, the gas drainage time changes in the amount of gangue output and order in the extraction sequence of stope blocks, thereby changing the production output. A multi-objective integer programming model was Optimization Production Scheduling of Underground Backfilling Mining

احصل على السعر

Full article: Numerical study of stability of coal pillars under

The sequence of pillar extraction, i.e., the orientation of the Line of extraction, provides flexibility in controlling the width of extraction, At Venkatesh Khani-7 coal mine, India, initially, a straight line of extraction is followed for panels CMP 5A to CMP7B/2, resulting in high strata control problems such as high stresses and severeFor the characteristics of overburden deformation and energy release under different mining sequences of close-distance coal seam groups, physical material similar simulation experiments were carried out, and comprehensive monitoring methods such as dial gauge, total station, micro-seismic monitor, and pressure sensor were used Energies Free Full-Text Study on Deformation and Energy

احصل على السعر

Slope stability calculation method for highwall mining with

Only a slope stability coefficient of 1.1 can guarantee to maximize the recovered retained coal resources while maintaining safety. Substituting FS = 1.1 into Eq. ( 12) yields 5.9 m as theIslam and Shinjo used Examine 2D (Rocscience 2013) a 2D boundary element method (BEM) to analyze the deformation and failure behaviour of a coal seam and to understand the nature of gas flow into a roadway entering the Barapukuria coal mine in Bangladesh. In this study an evaluation model is proposed to select the feasible mining Mining Sequence Deformation and Failure Behaviour

احصل على السعر

Spatial structure evolution of overlying strata and inducing

For the characteristics of overburden deformation and energy release under different mining sequences of close-distance coal seam groups, physical material similar simulation experiments were carried Expand. 16 [PDF] Save. Destabilization mechanism and energy evolution of coal pillar in rockburst disaster.Aiming at the problem of coal face failure of lower coal seam under the influence of repeated mining in close coal seams, with the working face 17,101 as a background, the coal samples mechanicsAnalysis of coal face stability of lower coal seam under

احصل على السعر

补连塔煤矿中生界高分辨率层序地层与沉积环境演化

沉积环境 /. 鄂尔多斯盆地 /. 补连塔煤矿 /. 层序地层 /. 中生界. Based on the data of multiple borehole cores and logging, combined with the regional geological background, the sequence stratigraphy and microfacies of Mesozoic in Bulianta coal mine were divided, and the evolution law of sedimentary environment was summarized.Pillar extraction, (also referred to as retreat mining; pillar recovery; stooping; pillar robbing; and bord and pillar second workings) is the practice of forming a series of pillars and then partially or totally extracting some or all of the pillars, usually with mining operations retreating out of a panel. There are a number of basic pillar extraction Pillar Extraction SpringerLink

احصل على السعر

Prediction Method for Mine Earthquake in Time Sequence

Under the background of the intelligent construction of a coal mine, how to efficiently extract effective information from the massive monitoring data of mine earthquakes, and improve prediction accuracy, is a research hotspot in the field of coal mine safety production. In view of this problem, more and more machine learning methods are We investigated differences of overburden failure induced by mining multiple seams in ascending and descending sequences under a large water body. A case study that involves mining in an ascending sequence was the Beizao coal mine, which is under the Bohai Sea, and one that involves mining in a descending sequence was the Overburden Failure Associated with Mining Coal Seams in

احصل على السعر

Experimental Study of Prevention and Control of Rock Burst

The control and prevention of rock burst in a steeply inclined coal seam are essential. In order to figure out the effects of filling and mining sequence on rock burst in the steeply inclined coal seam, B3+6 and B1+2 coal seams in Wudong coal mine are chosen as the research objects, and an in-house experiment system of similarity simulation is Abstract. During the last thee years, the MINE project has developed and successfully applied seismological tools, addressing different aspects of the monitoring of mining environments, as dynamic local-scale systems. The human interaction with the shallow underground mining environment, can lead to rock mass weakening or locally The MINE Project: Monitoring Induced Seismicity in a German Coal Mine

احصل على السعر

On strata damage and stress disturbance induced by coal mining

Following the actual coal mining sequence in Buertai coal mine, the experiment adopted the downward mining method, namely No. 22 coal seam (19.3 mm thickness) was mined first. 1840 kg pressure wasFor the characteristics of overburden deformation and energy release under different mining sequences of close-distance coal seam groups, physical material similar simulation experiments were carried out, and comprehensive monitoring methods such as dial gauge, total station, micro-seismic monitor, and pressure sensor were used Energies Free Full-Text Study on Deformation and Energy

احصل على السعر

Numerical simulation study of strip filling for water-preserved coal mining

The Jurassic coalfield in northern Shaanxi, China is one of the seven largest coalfields in the world. It is located in an arid region of northwestern China, with poor water resources and fragile ecological environment. Due to coal mining, the rock layers on the coal seam will be slumped and fractured to produce fissures. The penetrated fissures

احصل على السعر

<< Previous:كسارات المطرقة تخطيط وحساب
>> Next:معدات كسارة محجر الحجر الجيري

حقوق النشر © 2004-2020 بواسطة China Liming Heavy Industry Science and Technology Co.Ltd. جميع الحقوق محفوظة