Roof bolt support performance, Other Engineering

Assignment Help:

A certain coal mine has weak layer comprising of 10cm, 11cm, 9cm, 12cm, 15cm , and 19cm of inter laminated shales and mudstone. Design a full column resin bolt support system if the weak layer is overlain by 70cm of sandstone.
Given:
Hole diameter=28mm, bolt diameter=20mm, bolt tensile strength=500MPa, sandstone tensile strength=6MPa, bord width=6m, resin rock interface shear resistance=2.5MPa

Also determine the reasonable cut-out distance

Related Discussions:- Roof bolt support performance

Draw a block diagram of the control loop, A speed control system has an amp...

A speed control system has an amplifier-motor-control element capable of maintaining a speed of 4000 rpm at the output shaft with no external load and an input of 8 mV to the ampli

Energy emissions per usage, Q. The Energy related CO 2 emissions per usage...

Q. The Energy related CO 2 emissions per usage are in Florida: What is the CO 2 emission in kg/kWh and in lb/kWh in Florida? Knowing the emissions and the total gene

Embedded system, I have an assignment of engine control unit (hardware desi...

I have an assignment of engine control unit (hardware design and programming) if you have an expert.....

B.tech, limitations of nernsts law

limitations of nernsts law

Heat transfer, A heat recovery device involves transferring energy from hot...

A heat recovery device involves transferring energy from hot flue gases passing counter currently through an annular region to pressurized water flowing through the inner tube of t

Guidance laws , The guidance law is used to generate a requirement (usually...

The guidance law is used to generate a requirement (usually an required acceleration) that will achieve the guidance objective. In this course, we will look at three main types

Thermodynamics, is this a homework service

is this a homework service

Difference between fin and swell, Difference Between Fin and Swell ...

Difference Between Fin and Swell Swell : The unintentional bulges found on the casting surfaces are known as swells. Such enlargements on the casting surface are cau

Composite materials - approximate stability equatation, Most vehicles have ...

Most vehicles have the XZ plane as a plane of symmetry which results in D = 0 and F = 0. Further if the disturbance velociies are small then terms proportional to the square and pr

Maintenance Requirement Analysis, Ask questioA wire rope used as a crane ho...

Ask questioA wire rope used as a crane hoist rope has a mean life of 530 days. The wire rope predominantly fails in a wear-out mode caused by either corrosion, abrasive wear or fat

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages