Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method

A unequal and appropriate amount of technology, applied in the field of filling technology, can solve problems such as complex construction, high cost, and uncertain yield pressure, and achieve the effects of convenient and easy construction, alleviating unexpected impact, and ensuring integrity

Inactive Publication Date: 2012-10-03
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the defects of complex construction, high cost, and uncertain yielding pressure of the existing gob-side entry filling structure under the condition of a hard roof, this invention provides a new fi

Method used

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  • Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method
  • Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method
  • Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method

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Embodiment Construction

[0032] The structure and specific construction methods of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Step 1: After the excavation of the underground roadway, carry out anchor, cable, net, belt support and 6 supports of single hydraulic props on the working face, and arrange the working face at the same time. The goaf 12 is formed after the coal is coaled.

[0034] Step 2: Use a single hydraulic prop in the retaining entry 9 as the advance support 5 plus a hinged top beam support, and then use wooden pillars 11 for support and reinforcement within the filling width of the retaining entry side. With the advancement of the working face, the advance A single hydraulic prop is added to the support 5, and it is strengthened into a lag support 14; the lag support 14 and the wooden pillar 11 jointly bear the initial pressure of the roof before the lower filling body condenses.

[0035] Step 3: At the same time, the groun

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Abstract

The invention discloses a roadside proper yielding unequal combined filling structure of gob-side entry retaining and a construction method. An upper-layer filling body of the filling structure is accumulated by gangue bags; a mixture of water, cements and crashed gangues is filled in the gangue bag; a lower-layer filling body is a filling plaster wall; the filling plaster wall is formed by a mixture of water, cements, waste plasters, blast furnace slags, waste limes, coal ashes and gangue powders. By adjusting the filling height and the preparation proportion of the two filling bodies, the structure provided by the invention can ensure the contractibilities of the filling bodies to be in a reasonable range, thus the filling bodies can better adapt to the movement rule of the hard roof strata and guarantee the stability of the gob-side entry retaining.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV OF SCI & TECH
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