Determining patterns of the geomechanical factors influence on the fastening system loading in the preparatory mine workings

Bondarenko, Volodymyr; Symanovych, H.; Barabash, Mykhailo; Husiev, O.; Salieiev, I

doi:10.33271/mining14.01.044

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…Современные способы и средства позволяют опреде лять для таких зон напряженно-деформированное состо яние горных пород [9], параметры зоны опорного дав ления от очистного забоя [10], влияние различных гео механических факторов на нагружение крепи и режимы ее работы [11,12], прогнозировать высоту зоны рассло ения пород кровли [13] и определять поведение геоме ханической системы «слоистый массив -крепь выработ ки» посредством вычислительной модели [14], но оста ется нерешенным вопрос о прогнозировании аномаль ных зон повышенного горного давления.…”

Section: подземные работыunclassified

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2021

Ugol'

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В статье приведены результаты исследований проявлений горного давления в аномальной зоне поддержания выемочного штрека, сохраняемого за линией очистного забоя для повторного использования. В этой зоне параметры крепи, в обычных условиях обеспечивающие надежное поддержание выработки, оказались недостаточными. Предлагаемые авторами технические решения по усилению крепи штрека позволят обеспечить работоспособность выработки при ее поддержании в аномальной зоне повышенного горного давления на границе с выработанным пространством лавы, но в этом случае существенно возрастает стоимость крепления. В связи с этим и необходимостью перекрепления штрека на участках, где параметры крепи оказались недостаточными, становится актуальной задача прогноза аномальных зон повышенного горного давления, чтобы снизить затраты на поддержание выработок в аномальных зонах. Ключевые слова: выемочная выработка, крепь, поддержание горной выработки, аномальная зона повышенного горного давления. Для цитирования: Поддержание выработки для повторного ис пользования в аномальной зоне повышенного горного давления /

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Section: подземные работыunclassified

Untitled

2021

Ugol'

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“…The analysis of available local means and methods for preventing sudden outbursts of coal, rock and gas [18], [19] has proven that many of them reduce the rate of construction of mine workings. In this sense, the pre-drilling method of de-stressing wells is a positive one, which will be studied in detail from the point of view of the task of combating gasdynamic phenomena (GDP) at depths above 1000 m.…”

Section: Introductionmentioning

confidence: 99%

Methodical principles of experimental-analytical research into the influence of pre-drilled wells on the intensity of gas-dynamic phenomena manifestations

Bondarenko,

Kovalevska,

Krasnyk

et al. 2024

Min. miner. depos.

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Purpose.The research aims to substantiate the general provisions on coordination of the experimental-analytical research results of the influence of pre-drilled wells on the intensity of gas-dynamic phenomena manifestations (using the example of the mining-geological conditions of the phenomena at the PJSC Mine Administration Pokrovske, Ukraine). Methods. The research uses an integrated methodology consisting of indirect experimental methods for studying the adjacent rock mass state and tendencies. Findings. It has been proven that indirect experimental indicators of the rock mass state around the tunneling face are related to the peculiarities of the distribution of its stress-strain state components. Based on this research, the well lengths of up to 10-15 m has been determined to effectively and safely de-stress the rock mass. The experimental research validity is confirmed by conducted computational experiments, in the course of which the dependence of the propagation parameters of the stress-strain state component concentrations on the degree of hardness of the lithotypes is revealed, and a geomechanical substantiation to the tendencies of propagation of rock pressure anomalies near stoping and tunneling faces is given. The new knowledge obtained is the basis for creating a method for calculating rational parameters for the location of de-stressing pre-drilled wells. Originality. An objective assessment of the degree of adequacy and reliability of the computational experiment results has been made under the condition of using a new geomechanical model with mine studies of seismic-acoustic signal parameters and the initial gas release velocity. The main tendencies of vertical σу, horizontal σх and σz, as well as stress intensity propagation have been identified. The obtained results of exploring the bottom-hole mass are aimed at substantiating the parameters of anti-outburst measures for all preparatory mine workings. Practical implications. The conducted research is implemented in creation of a calculation method and recommendations for the selection of rational parameters for the location of de-stressing pre-drilled wells for the purpose of weakening the rock mass, surrounding the tunneling face, and reducing the probability of gas-dynamic phenomena occurrence due to the controlled weakening of adjacent rocks.

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“…По-четверте, в умовах Західного Донбасу підвищується ступінь впливу [6, 7] швидкості посування очисного вибою V о.в на процеси зсуву надвугільної товщі у порівнянні з іншими вугленосними регіонами впливу [12,[20][21][22][23][24][25], хоча основні закономірності зберігаються у якісному плані. Основна причина більш вагомого впливу V о.в має, на наш погляд, дві складові: низькі механічні властивості, за яких (за різних інших умов) розвиваються більші посування масиву та більш виражені реологічні властивості літотипів з активним проявом деформацій повзучості; останні залежать від тривалості дії аномалій гірського тиску, а вона, у свою чергу, -від швидкості посування очисного вибою.…”

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Development of ideas about the mechanism of coal-overlaying formation displacement in terms of its influence on local gas-drainage parameters in the Western Donbas conditions

Bondarenko¹,

Salieiev²,

Kovalevska³

et al. 2023

Coll. res. pap. nat. min. univ.

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Purpose. The research purpose is to study the mechanism of the influence of geomechanical-technological factors on the location parameters of the gas-drainage wells behind the longwall face in the area of stope operations under the conditions of weakly metamorphosed rocks. Research methodology. An integrated approach is used, including an analysis of existing research on the gas release patterns in the mine workings of extraction sites and local gas-drainage parameters, analysis of geomechanical processes, development of schemes for modeling by the finite element method, substantiation of methodological approaches for conducting experimental research into the rock pressure manifestations in extraction working, taking into account existing tendencies of the influence of stoping face advance velocity. Research results. The views on the mechanism of the stratified mass texture transformations of weak rocks have been developed during the study of the optimal extraction site gas-drainage parameters. The deformation development schemes have been constructed for any layer of the main roof behind the area of longwall face conjugation with the extraction working, displacement of coal-overlaying formation rocks along and across the extraction site with the location of gas-drainage wells. Based on the conducted research, recommendations on the rational location of gas-drainage wells have been obtained. Scientific novelty. The main characteristics of the weakly metamorphosed rock displacement process in the area of stope operations are studied in a spatial formulation, and the mechanism of the influence of geomechanical-technological factors on the expedient location parameters of gas-drainage wells behind the longwall face is represented on the relevant schemes. Practical value. The reliability of the proposed location parameters for gas-drainage wells behind the longwall face in the conditions of weakly metamorphosed rocks of the Western Donbas has been analyzed, taking into account the stoping face advance increased velocities.The conclusions drawn on the basis of rock displacement tendencies in the coal-overlaying formation are summarized in the schemes for identifying the mechanism of rock mass deformation near the area of stope operations.

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Determining patterns of the geomechanical factors influence on the fastening system loading in the preparatory mine workings

Cited by 6 publications

References 31 publications

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Methodical principles of experimental-analytical research into the influence of pre-drilled wells on the intensity of gas-dynamic phenomena manifestations

Development of ideas about the mechanism of coal-overlaying formation displacement in terms of its influence on local gas-drainage parameters in the Western Donbas conditions

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