Annual Report,2009 - Directorate General of Mines Safety
Annual Report,2009 - Directorate General of Mines Safety
Annual Report,2009 - Directorate General of Mines Safety
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DGMS <strong>Annual</strong> <strong>Report</strong>, <strong>2009</strong><br />
also cement grout provides less resistance than the resin grout because resin has<br />
higher strengths than the cement grout.<br />
It is, therefore necessary to have a minimum standard required for resin grout to<br />
provide desired result and fulfill the objectives to provide support in the mines.<br />
The matter was discussed in this <strong>Directorate</strong> with the scientists from Central Institute<br />
<strong>of</strong> Mining and Fuel Research (CIMFR), Manufactures and the Users. The following<br />
Standard and Parameters have been fixed as the minimum requirements for the Resin<br />
Capsules to be used in <strong>Mines</strong> after getting approval from this <strong>Directorate</strong>.<br />
2.0 STANDARD PARAMETERS & CHEMICAL COMPOSITION<br />
(a) Physical Condition :-<br />
Physical Condition <strong>of</strong> the resin capsule is an essential property for quality evaluation.<br />
The product performance depends upon the condition <strong>of</strong> the cartridges and their<br />
packaging shape & size and stiffness. The resin capsule shall have following<br />
properties:<br />
Sl.<br />
No.<br />
Parameters<br />
1 Physical Condition<br />
Crimping – Proper Crimping at ends to prevent<br />
leakage<br />
Hardening <strong>of</strong> the product – No hardening<br />
Shape & Size – To be in shape and specified size<br />
2. Straightness : The cartridges should be straight enough and<br />
not loose and too flexible to be difficult to push inside the<br />
hole<br />
Acceptable<br />
Limits<br />
Pass<br />
Pass<br />
Pass<br />
Pass<br />
3 Fragileness Test <strong>of</strong> the double chamber Poly-tube Pass<br />
(b) Get Time and Setting Time :<br />
The performance and workability <strong>of</strong> the resin capsule depend on the gel time and<br />
setting time. Gel time plays an important role in getting Physico-mechanical,<br />
properties <strong>of</strong> the resin matrix. The Gel time is defined as the period during which a<br />
resin can be mixed with no appreciable change in viscosity, i.e, before it begins to turn<br />
from fluid to Gel. Similarly, setting time is the period, in addition to gel time that is<br />
required for the resin to turn from Gel to Solid and attain enough strength.<br />
1. Gel Time<br />
(In Seconds)<br />
Fast Set<br />
20±5<br />
Medium Set<br />
45±5<br />
Slow Set<br />
95±5<br />
2. Setting Time<br />
(In Seconds)<br />
Fast Set<br />
10±2<br />
Medium Set<br />
12±2<br />
Slow Set<br />
20±2<br />
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