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RU94028321A - Method for unloading marginal mine working and cumulative explosive charge for forming initial fractures - Google Patents

Method for unloading marginal mine working and cumulative explosive charge for forming initial fractures

Info

Publication number
RU94028321A
RU94028321A RU94028321/03A RU94028321A RU94028321A RU 94028321 A RU94028321 A RU 94028321A RU 94028321/03 A RU94028321/03 A RU 94028321/03A RU 94028321 A RU94028321 A RU 94028321A RU 94028321 A RU94028321 A RU 94028321A
Authority
RU
Russia
Prior art keywords
unloading
cumulative
well
stresses
explosive charge
Prior art date
Application number
RU94028321/03A
Other languages
Russian (ru)
Other versions
RU2078927C1 (en
Inventor
Ю.А. Семенов
Ru]
С.Т. Кузнецов
А.В. Джигрин
С.А. Федористов
В.А. Гребенщиков
Ua]
Л.М. Гусельников
А.Н. Осипов
Original Assignee
Научно-исследовательский институт горной геомеханики и маркшейдерского дела
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Научно-исследовательский институт горной геомеханики и маркшейдерского дела filed Critical Научно-исследовательский институт горной геомеханики и маркшейдерского дела
Priority to RU94028321A priority Critical patent/RU2078927C1/en
Publication of RU94028321A publication Critical patent/RU94028321A/en
Application granted granted Critical
Publication of RU2078927C1 publication Critical patent/RU2078927C1/en

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  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

FIELD: mining. SUBSTANCE: initial crack is originated by blasting special cumulative charge oriented along working. The charge comprises a case with lengthwise slot for cumulative recess of explosive placed inside the case. Damping stemming is placed between upper and lower case caps and dividing caps as well as between charges and walls. Liquid is injected in the mode of hydraulic fracture after blasting and fracture surface development in preset limits. EFFECT: releasing working from increased stress.

Claims (1)

Изобретение применяется при разработке пластовых месторождений угля для разгрузки выработок от повышенных напряжений, а также для разгрузки от опасной концентрации напряжений на пластах, склонных к горным ударам и внезапным выбросам угля и газа. Для повышения эффективности разгрузки выработок и снятия опасной концентрации напряжений на удароопасных пластах и склонных к внезапным выбросам угля и газа предлагается способ направленного гидроразрыва и параметры заложения разгрузочных скважин, длина и и месторасположение начальной трещины, необходимая длина скважины, расстояние между скважинами в зависимости от структуры и строения пород основной кровли. Начальная трещина образуется взрыванием специального кумулятивного заряда, ориентированного вдоль выработки, который состоит из корпуса с продольной прорезью под кумулятивную выемку заряда ВВ, размещенного внутри корпуса. Между верхними и нижними крышками корпуса и разделительными крышками, а также между зарядами и стенками корпуса размещается демпфирующая забойка. После взрывания кумулятивного заряда производится нагнетание жидкости в режиме гидроразрыва и развитие поверхности разрушения в заданных пределах.The invention is used in the development of reservoir coal deposits for unloading workings from high stresses, as well as for unloading from a dangerous concentration of stresses in formations that are prone to rock blows and sudden emissions of coal and gas. To increase the efficiency of unloading the workings and relieving the dangerous concentration of stresses on shock-hazardous formations and prone to sudden emissions of coal and gas, a method of directional hydraulic fracturing and parameters of unloading wells, the length and location of the initial crack, the required length of the well, the distance between the wells depending on the structure and rock structures of the main roof. The initial crack is formed by blasting a special cumulative charge oriented along the mine, which consists of a body with a longitudinal slot for a cumulative recess of the explosive charge located inside the body. Between the upper and lower covers of the housing and the separation covers, as well as between the charges and the walls of the housing is located damping jamming. After the cumulative charge is blown up, the fluid is injected in the hydraulic fracturing mode and the fracture surface is developed within the specified limits.
RU94028321A 1994-07-27 1994-07-27 Method of relief of working marginal rock mass and shaped charge for formation of initial fissures RU2078927C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94028321A RU2078927C1 (en) 1994-07-27 1994-07-27 Method of relief of working marginal rock mass and shaped charge for formation of initial fissures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94028321A RU2078927C1 (en) 1994-07-27 1994-07-27 Method of relief of working marginal rock mass and shaped charge for formation of initial fissures

Publications (2)

Publication Number Publication Date
RU94028321A true RU94028321A (en) 1996-06-10
RU2078927C1 RU2078927C1 (en) 1997-05-10

Family

ID=20159066

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94028321A RU2078927C1 (en) 1994-07-27 1994-07-27 Method of relief of working marginal rock mass and shaped charge for formation of initial fissures

Country Status (1)

Country Link
RU (1) RU2078927C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390538A (en) * 2014-10-21 2015-03-04 武汉大学 Stress relief blasting method based on tunnel face notching

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2478786C1 (en) * 2011-09-16 2013-04-10 Учреждение Российской академии наук Институт горного дела Севера им. Н.В. Черского Сибирского отделения РАН Method to control hard roof under conditions of cryolithic zone
RU2493368C1 (en) * 2012-04-02 2013-09-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Method to develop unloading slots in bump-hazardous rock massif by thermal treatment of wells
CN111022049B (en) * 2019-11-25 2020-12-04 中国矿业大学 A gob-side entry retaining method for roof cutting and pressure relief with controllable operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390538A (en) * 2014-10-21 2015-03-04 武汉大学 Stress relief blasting method based on tunnel face notching
CN104390538B (en) * 2014-10-21 2016-08-24 武汉大学 A kind of stress relieving blasting method based on face grooving

Also Published As

Publication number Publication date
RU2078927C1 (en) 1997-05-10

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