Side abutment pressure distribution by field measurement

Wang, Lianguo; Song, Yang; He, Xing-hua; Zhang, Jian

doi:10.1016/s1006-1266(08)60288-6

Cited by 22 publications

(17 citation statements)

References 1 publication

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“…It is very important to make clear the distribution rules and influence range of abutment pressure around the face, because it can provide the references for adopting reasonable supporting means, determining the location and time of the adjacent entry driving, preventing the dynamic disasters induced by mining, etc. (Suo, 2007;Xie et al, 2007;Wang et al, 2008;Habib et al, 2010). Therefore, the distributions of abutment pressure around the 1151(3) FMTC Face in Xieqiao Colliery were investigated.…”

Section: Introductionmentioning

confidence: 99%

Distribution laws of abutment pressure around fully mechanized top-coal caving face by in-situ measurement

Chang

2011

J Coal Sci Eng China

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In order to obtain the distribution rules of abutment pressure around the 1151(3) fully mechanized top-coal caving (FMTC) face of Xieqiao Colliery, the KSE-Ⅱ-1 type bore-hole stress gauges were installed in the tailentry and headentry to measure the mining-induced stress. The distribution rules of the front and side abutment pressure were demonstrated. The results show that distribution rules of stress are obviously different in the vicinity of the face and entries. The peak value of abutment pressure in the protective coal pillar and face are located commonly in front of the working face along the strike, and they are located at the stress-decreased zone near the face. There is no stress peak value in the lateral coal mass beside the headentry in front of the face on the strike, and the peak value of abutment pressure appears at the rear area of the face. There are stress peak values both in the protective coal pillar and in the lateral coal mass beside the headentry to the dip.

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Section: Introductionmentioning

confidence: 99%

Distribution laws of abutment pressure around fully mechanized top-coal caving face by in-situ measurement

Chang

2011

J Coal Sci Eng China

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“…Грунтово-гидрологические условия по длине трассы, как правило, неоднородны, изменяются и параметры земляного полотна, что обусловливает необходимость использования разнотипных дорожно-строительных машин для возведения земляного полотна [5,[10][11][12][13][14][15][16][17][18][19][20].…”

Section: еи кромский св жиляевunclassified

New Technology for Seals Subgrade

Kromsky¹,

Zhilyaev²

2016

MEI

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The basic principles of soil compaction at the device subgrade different mechanisms. Presented designs and considered the concept cone compactor road-building machinery for deep soil compaction during the construction of the roadbed. It is noted that the destruction of the pavement roads usually occurs as a result of deformations of the subgrade, in most cases related to honeycombed soil subgrade defects are often caused by violations of the construction process technology and the use of obsolete road-building equipment. Minor violations and damage to develop into dangerous strain that creates emergency situations and leads to a significant reduction and speed limits of vehicles and, consequently, to large economic losses. The basic advantages of the new compression technology with tapered compactors. Unrolling-it is a continuous process of formation of a conical-cylindrical cavity by deformation and the rolling compaction tapered working mechanism. The challenge of new technology-to create the conditions for maximum air output from the array of material being compacted. Realized with technology called us venting and existing-compressed air. To understand the soil compaction process new work equipment is considered a power balance between the force feeding and resistance forces the introduction of the cone when it is immersed. The dependences for the calculation of the total torque and driving power, which must be applied to the driven shaft to force the device to roll tapered compactor depending on the geometric parameters of a conical working body and the physical and mechanical properties of compacted soil. New consumer properties much higher sealing means of the prior art, if the thickness of the compacted soil layer into the mound with existing technology is not exceeds two feet, then the cone compactor hardly depends on the thickness (height) packed layer. After deep compaction compactor cone and fill the pits (holes) is more durable material removed subgrade subsidence due to increase density, reduce soil tendency to water saturation, i.e., several times increases its load-bearing capacity.

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“…There are three monitoring approaches: back analysis of convergence of surrounding rocks [7], borehole stress measurement [8][9][10] and back analysis by geophysical surveys (e.g. electromagnetic radiation, microseismicity or acoustic emission, etc.)…”

Section: Introductionmentioning

confidence: 99%